International Telecommunication Union
ITU-T
Service Requirements
and Capabilities of
NGN
Marco Carugi
Q.2/13 Rapporteur
Senior Advisor, Nortel Networks
marco.carugi@nortel.com
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Outline
ITU-T
o Key Requirements of NGN Release 1 Environment
o Services and Capabilities
o Items for Release 2 and beyond
Based on ITU-T FGNGN and ETSI TISPAN work
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
ITU-T FGNGN Release based approach
ITU-T
o
o
o
Release based approach : method of prioritizing by
identifying a set of services to be addressed in a certain
time frame.
“FGNGN should progress the work to define the service
requirements and capabilities needed to realize the
services in addition to defining other associated
capabilities as needed to facilitate a NGN in a first
Release.”
“The approach will not prevent other work, such as
development of more generic (release independent)
capabilities, and collection of services, requirements
and issues for later releases.”
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
FGNGN working assumptions
ITU-T
o Compliance to NGN Rel.1 of a given network
environment does not mean support of all possible
combinations of services (as well as capabilities and
network configurations)
o Specific realisations of NGN Rel.1 may extend beyond
the identified services and capabilities, as well as SP
requirements may drive a particular (sub/super) set of
services and capabilities to be supported in a
particular network
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment - Architecture
ITU-T
o Advanced architecture objectives
• Comprehensive set of services over a unifying IP based network
• Services separable from Transport stratum into Service stratum
• Transport stratum has to support a multiplicity of access
networks and a variety of mobile and fixed terminal types
• Service not limited to those provided by the “home network”
• Services shall be able to traverse multiple providers’ networks
o The positioning of the IP Multimedia Subsystem (IMS)
• Unanimously agreed starting point for Release 1: to leverage IMS
capabilities defined by 3GPP/3GPP2
• The capabilities of the IMS need to be extended and
accommodate the heterogeneous access transport environment of
Release 1
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment – Open environment
ITU-T
o Open environment objectives for service creation
and provisioning
• Flexible service framework for implementation of
value added services using capabilities
• Capabilities are accessed via standard application interfaces
• Third Party application access via Application Network
Interface
o The following classes of value added service
environments are considered for Release 1:
• IN-based service environment (INAP, CAMEL, WIN, …)
• IMS-based service environment
• Open service environment (OSA/Parlay, Parlay X, OMA, …)
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment - Security
ITU-T
o Security objectives
• Address security dimensions
• Address the security features required for secure interconnection
Guidelines for NGN Security R1
o
o
o
o
o
o
Overview of security standards
NGN threat model (X.800, X.805)
Security risks in NGN
Security dimensions and threats
countered (ITU-T X.805)
NGN Security Models
Security of the NGN subsystems
Security Requirements for NGN R1
o
o
o
General security requirements
(based on X.805 concepts)
General security objectives
Security requirements for Transport
Stratum and for Service Stratum
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment - Management
Interface Capabilities
ITU-T
o
Management objectives
• Monitoring and control of NGN services and components
o
Release 1 work items
• Definition of realistic R1 objectives and corresponding solutions
• Focus on identification of management requirements, architecture, and
protocol-neutral/protocol-specific interface specifications
o
Output based on collaboration among ITU-T NGN Management
Focus Group/SG4 and partner organizations
•
•
o
SG15, TISPAN WG8, ATIS TMOC, TMF, 3GPP SA5, OASIS, IETF O&M
Emphasis on reuse of partner specifications
NGN Management Specification Roadmap
•
•
Gaps and best organization to fill the gaps
Overlaps and stimulating harmonization among partners
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment – Quality of Service
ITU-T
o QoS objectives
• End-to-end QoS environment for services via QoS coordination across
the Transport stratum
• NGN Release 1 provides an initial set of requirements, architectures,
mechanisms and guidelines to enable end-to-end QoS
o Main work items: Procedures for QoS control
• IP QoS signalling
• Resource Reservation, Admission Control and Gateway Control
• NAPT and Firewall traversal
o Focus on Resource and Admission Control
• Authorization checking based on various policy criterias
• FGNGN : coordination between access and core, between core and
other NGNs
• TISPAN Release 1: QoS control only for access network
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 environment - Mobility
ITU-T
o Mobile users requirements
• Seamless and transparent mechanisms for roaming between operators
• Access from variety of environments with variety of terminals with
varying capabilities
o Towards Fixed-Mobile Convergence (FMC)
• converged services, converged devices, converged networks
o No major new interfaces for mobility proposed for Release 1
• Personal mobility will exist where users can register themselves to
the services
• Terminal Mobility will exist within and among networks where
terminals can register to the network
o Nomadism (mobility without maintaining service continuity)
• It shall be supported in Rel.1 between networks and within a network
• This does not exclude support for mobility with service continuity
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Evolution requirements to NGN:
PSTN/ISDN Emulation and Simulation
ITU-T
NGN Rel.1 will support (in evolution path to NGN) :
o legacy terminal equipment (e.g. PSTN/ISDN phones)
o PSTN/ISDN-like service capabilities
PSTN/ISDN Emulation
o From the end user perspective, the NGN “appears” supporting
the same types of services offered by the existing PSTN/ISDN
o Legacy terminals are enabled to continue to use existing
telecommunication services while connected to NGN
PSTN/ISDN Simulation
o NGN terminals in an NGN network are enabled to use PSTN/ISDN-
like capabilities
o Legacy terminals with terminal adaptations may be also used
o Implemented over IP-based control infrastructure
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Progress in Evolution to NGN
ITU-T What has been done in FGNGN
Principles and requirements, scenarios for PSTN/ISDN evolution
o PSTN/ISDN Emulation and Simulation scenarios
• Call Server-based and IMS-based Emulation approaches
• PSTN/ISDN Simulation based on IMS capabilities
o
What next in ITU-T
o Examination of legacy services and selection of candidates for
PSTN/ISDN Emulation and Simulation
o Identification of additional capabilities
o Control, signalling, management and protocol aspects
TISPAN additional work in Release 1
o Description and requirements of Simulation services
o Ongoing work on E/S protocol specifications
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Basic components: Release 1 Requirements for
Access Networks (AN)
ITU-T
o NGN will support AN of diverse technologies and
capabilities
• All AN types are required to provide IP connectivity
o FGNGN Rel.1: non-exhaustive set of candidate
technologies
• NGN-GSI selection will be based on Rel.1 time
constraints against respective technology maturity
o TISPAN Rel.1: limited set of technologies
• Focus on xDSL and 3GPP/3GPP2 Packet Switched
domain
• Others under discussion for Rel.2
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Basic components : Release 1 Requirements for
Interconnection with peer networks
ITU-T
o Interconnection at the Network Node Interface (NNI)
• Between multiple NGN domains
• Between NGN domains and other networks
o Interoperability will be based on defined
interconnect specifications
o FGNGN candidate Release 1 NNI interconnections (*)
•
•
•
•
•
•
PSTN/ISDN
PLMN (Public Land Mobile Network)
Cable networks
Internet
Broadcast networks
Enterprise networks (Private NNI)
(*) Similar considerations to the AN case will apply
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Interconnection between NGN domains
ITU-T
o Practicable Interconnection arrangements are essential
o GSMA is considering GRX backbone extension to IMS. NGN ?
o TISPAN is discussing NGN backbone routing options:
• Internet routing
• Private IP domain: routing across common backbone
• IP isolated subnets: step-by-step routing (PSTN-like model)
o Other related issues
• IP addressing : IP connectivity, private vs public, IPv4 vs IPv6
• User identification options for routing and DNS/ENUM options
• QoS and security
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Basic components : Release 1 Requirements for
User Networks and Equipment
ITU-T
o Customers may deploy a variety of network
configurations inside their networks
o Customers may deploy firewalls and private IP
addresses in combination with NAPT
o NGN Rel.1 support for user functions will be limited
to control (part of) the gateway functions between
user network and AN
o NGN shall support a huge variety of user equipment
o But NGN Rel.1 does not specify or mandate a
particular NGN user equipment type or capability
o However, user equipment should enable interface
adaptation to varying user requirements
(accessibility)
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
The Service Shift in NGN
ITU-T
o In today’s networks, services are typically “vertically
integrated”, requiring specific infrastructure
components for their delivery
o Key expectation in NGN : flexible service creation and
innovation
• Focus will be on standard “service capabilities” as
service enabling toolkit
o The service shift as challenge for NGN Regulation
• NGN moves the competition from lower layers to service layers
• This leads to new sources of possible market power,
bottlenecks
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Release 1 Services & Capabilities
ITU-T
FGNGN Release 1 Scope
Service Types
o Multimedia services
TISPAN Release 1
o PSTN/ISDN Simulation services
IP Multimedia services (supported by
IMS)
o PSTN/ISDN Emulation services
• Multimedia Telephony, Videotelephony
o Internet access
o Other services
• Others (IMS messaging, Presence, …)
o Public interest service aspects
PSTN/ISDN Emulation services
Service Capabilities
Emergency communications from
Citizen to Authority
o Basic capabilities
o Service support capabilities
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
The provisional classification of Capabilities
adopted in FGNGN
ITU-T
Basic capabilities
o Underlying capabilities
capabilities generally not
accessed and/or used directly
by services, mostly located in
NGN FRA transport stratum
or
(directly accessed) capabilities
of general usage by services
(e.g. not used by a specific
(class of) service), mostly
located in NGN FRA service
stratum
Service support capabilities
o Capabilities generally accessed
and/or used directly by selected
services, though not generally
used by all services - mostly
located in NGN FRA service
stratum
They are generally combined
with other capabilities/services
to provide enhanced
functionality. Some may be also
used as stand alone services in
specific cases (e.g. presence
service)
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
FGNGN Service support capabilities
ITU-T
Open Service Environment
To support and establish an
environment for enhanced, flexible
and open service creation and
provisioning
o Service coordination
o Application Service Interworking
o Service discovery
o Service registration
o Developer support
Profile management
o User Profile
o Device Profile
Policy Management
Service Enablers
PSTN/ISDN Emulation support
Other capabilities of interest
for network/service providers
o Capabilities for Public
interest services
o Digital right management
o Fraud detection and
management
o Number portability
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
FGNGN Service enablers
ITU-T To support specific or advanced services and enable access and/or
handling of specific information provided by these capabilities
Current list is mostly derived from 3GPP and OMA
o
o
o
o
o
o
o
o
o
o
o
o
Group management
Personal information support
Message handling
Broadcast/Multicast support
Presence
Location management
Push-based support
Device management
Session handling
Web-based application support and content processing
Data synchronization
Commerce and Charging
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Which requirements and capabilities for R2?
ITU-T
o Additional reqts/capabilities based on service scenarios
• Business models, Interconnection, AN variety, Converged services
o Advances in Customer Networks
• Delivering QoS to terminal, Home Networking integration with NGN
o More support on Corporate communications requirements
• NGN services, cooperation with NGN in service provisioning
• NGN integration (addressing, identification, security, QoS, mobility)
o More services
• Extensions to R1 (simulation)
• Multicast, more interactive entertainment (IPTV etc.)
• Identity-based services (sensor/RFID networks), Push-to-Talk
o Full Mobility -> true Fixed-Mobile Convergence
o Advances in QoS
• Resource monitoring, Traffic Engineering
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Which requirements and capabilities for R2?
ITU-T o Advances in Transport
• To satisfy Service stratum requirements (FPBN)
• Carrier Ethernet, Broadband Wireless Access
o Solutions for Interconnect issues
• Addressing, routing, security, QoS
o Service Delivery Platforms
• Third party access, Web services linkage
• Multiple business models and service scenarios
• Positioning versus self-provisioned services over the Internet
o Advanced Management capabilities
• Subscription, Interconnect, Customer Management, …
o Others
• Auto configuration, User Data, Online Charging
o Protocols (profiles!) to deliver the NGN promise
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
International Telecommunication Union
ITU-T
Thank you for your
attention
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
ITU-T
Background information
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Service capabilities :
componentizing the network functions
ITU-T
Service Capability: reusable service building block
o a (group of) function(s) or operation(s) within a
service provider’s network, reusable at runtime by
other services
o More functions may be interworked for service
execution and management
o Some functions can play both roles of Service and
Service Capability (e.g. Presence)
o Service Capabilities may be used by
• services within that SP’s network (e.g. via SIP)
• services outside of that SP’s network domain (e.g.
via Parlay, Web Services)
• Third party access, externalisation
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
NGN Release 1 Capabilities in FGNGN: what for
ITU-T
o The capabilities identified in FGNGN have been derived from
functionalities already developed in various technical bodies
and considered ready for use in Release 1 time frame
o A list of capabilities with no ambition to be exhaustive and to
identify the most appropriate level of functional aggregation
for NGN Release 1 realisations
o Basically, the list provides guidelines for the NGN architecture
work so that the functional building blocks identified in the
NGN architecture are able to support these capabilities
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Basic capabilities
ITU-T
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Connectivity capabilities
Media resource management
Access transport capabilities
Interoperability and Interworking
Routing
Numbering, naming and addressing
QoS-based Resource and Traffic Management
Identification
Authentication and authorization
Security and Privacy
Mobility management
OAM
Management aspects
Accounting, charging and billing
Other capabilities of interest for network and service providers
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Mapping services to Capabilities (examples)
Services\Service Enablers
ITU-T
Presence
Location
mgt
Group
mgt
Pers. Inf.
Support
Message
Handling
Bcast/Mcast
Support
Push-Based
Support
Real-time Conversational
Voice services
Session
Handling
X
Messaging services
X
X
Push to talk over NGN
X
X
X
X
X
X
X
Point to Point interactive
multimedia services
X
X
Collaborative interactive
communication services
X
Content Delivery Services
X
X
Push-based Services
X
X
Broadcast/Multicast Svcs
X
Hosted and transit services
for enterprises
X
Information Services
X
X
Presence, notification Svcs
X
X
X
3GPP Rel.6/ 3GPP2 Rel. A
OSA-based services
X
X
X
Data Retrieval
X
X
X
X
X
X
X
X
Sensor Network
Over the Net. Device Mgt
X
X
X
X
X
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
X
X
Main “stage 1 deliverables” on
NGN service requirements and capabilities
ITU-T
ETSI TISPAN Release 1
o
o
Release 1 definition
Focus Group on NGN
o
Release 1 Scope
Service and Capabilities requirements
o Release 1 Requirements
(Requirements per class of services)
(High-level requirements)
o
Requirements for multimedia
telephony with PSTN/ISDN simulation
services
o
NGN Videotelephony service
description
o
Others
To
NGN-GSI
Other stage 1 work items in NGN-GSI(*)
- Service requirements
- Service scenarios
- Service capabilities
(*) A following slide provides details from
Q.2/13 activity
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
TISPAN Release 1 Multimedia Telephony services
ITU-T
Multimedia Telephony with PSTN/ISDN simulation services
o Service characteristics
•
•
•
•
PSTN/ISDN-like services, but not limited to the voice media
Some correspond to popular PSTN/ISDN supplementary services
No mandatory set in a particular network deployment
Interoperability with PSTN/PLMN-CS networks shall be supported, but
not required for all services offered in the CS network
o Three service categories
• Mandatory: shall be offered when there is a service offer
• OIP, OIR, TIP, TIR, MCID, ACR
• Recommended: offer transition from PSTN/ISDN to NGN
• CDIV (CFU, CFB, CFNR, CFNL, CD), CW, HOLD, CB, CCBS, MWI
• Optional
• CONF, AOC, ECT, RC
• Service interaction between pairs of these services has been analysed
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006
Service related work items
currently under development inside Q.2/13
General NGN Requirements
o
NGN Release 1 requirements Y.NGN-R1-reqts
Focused on NGN services and scenarios
o
IMS-based Real Time Conversational Voice services over NGN Y.ngn-rtconv
o
UPT (Universal Personal Telecommunications) service over NGN Y.ngn-upt
o
NGN service requirements for ID-based applications Y.idserv-reqts
Focused on NGN capabilities
o
Requirements and framework allowing accounting, charging and billing
capabilities in NGN Y.ngn-account
o
Open Service Environment Capabilities for NGN Applications and User Services
Y.ngn-openenv
o
VPN Service Capabilities in NGN mobile environment Y.ngn-vpn NGN Multicast
Service Framework Y.ngn-mcastsf
o
NGN Multicast service capabilities with MPLS-based QoS support Y.ngn-mcast
o
MPLS-based Mobility and QoS capabilities for NGN services Y.mpls-mob
Q2 work is in coordination with NGN-GSI Questions (Q1, Q2, Q8/13,etc.), other
ITU-T SGs and SDOs (including regional ones - TISPAN, ATIS, ASTAP)
ITU-T
ITU-T Worshop on “Next Generation Networks”
Hanoi, Vietnam, 15-16 May 2006